Fertility period calculator

Details Fertility period calculator Fertility period calculator

1992-04-01

1994-05-10

Gellner, Michael L.

Registers

Calculators

Single axis

235 78RC, 235 88RC, G06C 2700, G06C 300

Patent

active

053109945

ABSTRACT:
A fertility period calculator especially suited for third world countries, non-complex in operation, having two rotatable disks that require identification of numerals representing the days of the month and the average number of days in the user's menstrual cycle.

REFERENCES:
patent: 2725195 (1955-11-01), Rueff
patent: 3215344 (1965-11-01), Joffe
patent: 3278118 (1966-10-01), Klein, Jr.
patent: 3486691 (1969-12-01), Rodriguez

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